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Pituitary begins releasing FSH

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FSH is still high, begin steady increase of estrogen

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15-20 primordial follicles begin, only a few become primary follicles

follicular from squamous to cuboidal

primary follicles grow adding granulosa cells creating stratum granulosum

zona pellucida forms around primary oocyte between it and stratum granulosum

stromal cells begin to organize into a surrounding layer called theca folliculi

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Note the
-oocyte
-zona Pellucida
-Zona Granulosa (Stratum Granulosum)
-Theca Cells (Theca Folliculi)
-Can you see

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The antrum appears, then the primary follicle becomes the Secondary Follicle.

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Occurs after day 14 / after ovulation.

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The Antrum and Granulosa cells push together and create the Cummulus Oophorus.

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After meiosis 1, before ovulation

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If the ovulated oocyte is fertilized the corpus luteum persists and becomes bigger and bigger.

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Occurs at day 14 or 14 days before cycle ends

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If it isn't fertilized it degenerates and becomes Degenerating Corpus Luteum.

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A follicle containing a cavity; a mature ovarian follicle.

A follicle after meiosis one, and before ovulation.

From the dominant follicle, the ovulated oocyte will originate

Granulosa cells secreting fluids, resulting in the increase size of the antrum.

It moves toward the edge, preparing for ovulation.

The follicle is pushed against the surface of the ovary.

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Follicle ruptures and allows the oocyte to be ejected from the ovary

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Theca folliculi differentiates into two layers.

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when it isn't fertilized the corpus luteum serves no function and degenerates over time

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The Corpus Luteum is essential for the maintenance and support of the growing Embryo and Uterus.

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The structure of cells that surround the floating oocyte is called the corona radiata.

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Granulosa cells & theca cells will differentiate into Corpus Luteum.  Then , Luteum cells then turn into Corpus Luteum

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The follicle is pushed against the surface of the ovary

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When fertilization occurs, the corpus grows in a proficient size to support the developing fetus.

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The ovary and the thick externa contract and give it a little push

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Once oocyte is out of the ovary, it enters the fallopian tube

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Corpus Luteum is responsible for embryo growth & uterus growth

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Theca internal provides nutrients
and hormone secretion
Theca external contracts during ovulation

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This stage can occur 10-12 days after ovulation

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"It provides for the maturation and release of a fertilizable oocyte. It also forms the corpus luteum, which promotes and maintains implantation of the embryo. For these processes to occur, the follicle has to grow, ovulate, and luteinize."

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Finally the second follicle goes through two stages of meiosis and is then dormant

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"A fluid-filled, spherical vesicle in the ovary of a mammal, containing an oocyte attached to its wall, and responsible for oestrogen production in the ovary."

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begins with increased FSH